Intraterrestrials : discovering the strangest life on Earth

"A biologist's firsthand account of the hunt for life beneath earth's surface-and how new discoveries are challenging our most basic assumptions about the nature of life on Earth life thrives in the deepest, darkest recesses of Earth's crust-from methane seeps in the ocean floor to the highest reaches of Arctic permafrost-and it is unlike anything seen on the surface. Intraterrestrials shares what scientists are learning about these strange types...